標題: Bit Error Rate和Q factor有什麼關聯? [打印本頁] 作者: jelly811737 時間: 2008-1-23 02:27 PM 標題: Bit Error Rate和Q factor有什麼關聯? Bit Error Rate和Q factor有什麼關聯?7 v! l2 N0 D [- z9 s0 X" f
由於在安捷倫示波器量測眼圖時發現有量測Q factor這個功能， + P" s2 l4 u6 m% t所以在想BER和Q factor是否有關聯性存在。 9 b( E8 C, G$ ]安捷倫公司有解釋:. p2 z) j- Z h
What is Q Factor? : f M+ J$ f7 T8 O4 ?5 p8 i+ B; H 0 \/ u: H7 d6 {$ d q/ WQ is a measure of the electrical signal to noise of the system at the receiver decision threshold. . C2 Y/ G! d5 d% A2 E2 s* d; S, K
When it is impractical to measure BER with conventional techniques, Q may be used to estimate BER. 7 m! Q+ K3 F! h" s7 c; C. V
Q Factor is a figure of merit often used in optically amplified systems in which noise from the amplifiers dominates receiver noise.0 f" K+ }# z& B1 U
A Q measurement application is included in every N4906A. ]& [: R/ S% T2 r) T6 x0 ?: N& e1 u6 f% B6 ~3 u% A. f
想請問各位先進是否知道有BER和Q factor的轉換方程式，或是其他相關資料。 3 T9 u* Z: x4 M% C. ~麻煩各位幫幫我。